Coal ok



00. m 7H, ,fm d@ J ,.d .i my@ a@ f m mf 4M N. PErERS, PH0T0-L THOGRAFHERWASHINGTON D C UNITE LOUIS D. BARTLETT, OF BOSTON, MASSACHUSETTS.

COAL OR ASI-I SIFTER.

Specification of Letters Patent No. 21,405, dated September 7', 1858.

To all 'whom t may concern:

Be it known that I, L. D. BARTLETT, of Boston, in the county of Suffolkand State ot Massachusetts, have invented new and useful Improvements inSitters for Sitting Ooal-Oinders and other Similar Substances; and I dohereby declare that the following is a full and exact description of theconstruction and operation of the saine, reference being had to theaccompanying drawings, making part of this specication, in which- Figurel represents in elevation, the parts as used in connection with eachother in sifting. Fig. 2, represents the parts without the sieve, haltlin section. Fig. 3, a plan of the saine.

The object of Iny invention, is to construct the covers of vessels usedas receptacles for ashes, so that, when sifting cinders in a connnoncircular coal sieve, of the kind and size usually sold, it can be usedinV such a manner, as will prevent the escape of dust, and allow theashes to pass at once into the vessel without further handling.

As barrels are extensively used to deposit ashes in, I will describe myinvention as applicable to that vessel, and constructed of wood, thoughwithout limiting myself in those particulars. 3

An annular ring A, formed with a rabbet around its inner circumference,with a'cover B, fitting to it, together, complete a cover to the barrel;the sieve is used by removing the cover from the ring, and insertingt-he sieve 3 in its place; the cover then being used as a cover to thesieve. By rotating the sieve back and forth, the cinders are agitated,until the ashes are separated from the coal.

I do not claim using a circular sieve on 4 top, and fitting into thevessel, to be rotated back and forth, for that is old., and well known;but

I claim- Using the annular ring, and the cover, in 45

